The optimization process and recommendations:

1. Avoid OR Conditions By Using UNION (modified query below): In mosts cases, filtering using the OR operator cannot be applied using indexes. A more optimized alternative will be to split the query to two parts combined with a UNION clause, while each query holds one part of the original OR condition.
2. Avoid Selecting Unnecessary Columns (query line: 2): Avoid selecting all columns with the '*' wildcard, unless you intend to use them all. Selecting redundant columns may result in unnecessary performance degradation.
3. Create Optimal Indexes (modified query below): The recommended indexes are an integral part of this optimization effort and should be created before testing the execution duration of the optimized query.
4. Prefer Inner Join Over Left Join (modified query below): We identified that one or more left joined entities (e.g. `UniqueWords`) are used in the 'where' clause, in a way that allows to replace it with an optimized inner join. Inner joins can be fully optimized by the database, while Left joins apply limitations on the database's optimizer.
5. Use UNION ALL instead of UNION (query line: 39): Always use UNION ALL unless you need to eliminate duplicate records. By using UNION ALL, you'll avoid the expensive distinct operation the database applies when using a UNION clause.

Optimal indexes for this query:

CREATE INDEX pulledtexts_idx_id ON "PulledTexts" ("Id");
CREATE INDEX uniquewords_idx_id ON "UniqueWords" ("Id");
CREATE INDEX uniquewords_idx_wordtext ON "UniqueWords" ("WordText");
CREATE INDEX wordtexts_idx_wordidid ON "WordTexts" ("WordIdId");

The optimized query:

SELECT
        * 
    FROM
        "PulledTexts" 
    WHERE
        "PulledTexts"."Id" IN (
            SELECT
                textidid 
            FROM
                ((SELECT
                    "TextIdId" AS textidid 
                FROM
                    "WordTexts" AS "wordTexts" 
                LEFT JOIN
                    "UniqueWords" AS "wordTexts.WordId" 
                        ON "wordTexts"."WordIdId" = "wordTexts.WordId"."Id" 
                WHERE
                    "TextIdId" IN (
                        SELECT
                            "TextIdId" and1 
                        FROM
                            "WordTexts" AS "wordTexts" 
                        INNER JOIN
                            "UniqueWords" AS "wordTexts.WordId" 
                                ON "wordTexts"."WordIdId" = "wordTexts.WordId"."Id" 
                        WHERE
                            "wordTexts.WordId"."WordText" = 'audit' INTERSECT SELECT
                                "TextIdId" and2 
                            FROM
                                "WordTexts" AS "wordTexts" 
                            INNER JOIN
                                "UniqueWords" AS "wordTexts.WordId" 
                                    ON "wordTexts"."WordIdId" = "wordTexts.WordId"."Id" 
                            WHERE
                                "wordTexts.WordId"."WordText" = 'trial'
                        )
                ) 
            UNION
            DISTINCT (SELECT
                "TextIdId" AS textidid 
            FROM
                "WordTexts" AS "wordTexts" 
            INNER JOIN
                "UniqueWords" AS "wordTexts.WordId" 
                    ON "wordTexts"."WordIdId" = "wordTexts.WordId"."Id" 
            WHERE
                "wordTexts.WordId"."WordText" = 'automate')
        ) AS union1
    )